Question 976079
2x-2y-2z=3
x+4y-z=2
-2x-8y+2z=-4
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2x -2y-2z=3
-2x-8y+2z=-4
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-10y = -1
y = 1/10 ********************
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x+4y-z=2  Eqn A
-2x-8y+2z=-4  Eqn B
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Eqn B is -2 times Eqn A
---> dependent, no unique solutions for x or z.